Zero press

The zero press is a technique that can be used to activate switches through walls and at farther distances than is normally possible. It is commonly used in speedrunning to reach normally inaccessible switches in order to skip sections of maps.

Performing it requires precise positioning parallel to the button linedef that is typically achieved by making very slight adjustments while pressing the use key repeatedly. This is helped along by shorttics, which cuts the player's range of possible turning angles down, making it significantly easier to aim parallel to buttons placed at right angles or even some diagonal angles.

The trick is named after Zero-Master, who discovered and shared it in 2017. This led to many speedrunning record improvements, such as on which became beatable in three seconds.